/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/IntrinsicCorrespondenceUtils.h
number of surface edges within the specified intrinsic triangle that are adjacent to the specified triangle corner. This excludes any surface edges that are along the intrinsic triangle boundary edges. note it is assumed that IntrinsicTriEIDs are edge ID of an intrinsic triangle, but no checking is done.
int32 NumCornerEmanatingRefEdges ( const [FIndex3i](API\Runtime\GeometryCore\FIndex3i) & IntrinsicTriEIDs, const int32 TriCornerIndex ) const